BC9120 - Introduction

The BC9120 Bus Terminal Controller is a Bus Coupler with integrated PLC functionality and has a bus interface for Ethernet. It is an intelligent slave and can be used as decentralized intelligence in the Ethernet system. In conjunction with the K-bus extension, the BC9120 enables connection of up to 255 Bus Terminals to a controller.

In terms of performance, the BC9120 Bus Terminal Controller lies between the BC9050 and the BX9000. The BX series Bus Terminal Controllers have a larger memory and additional interfaces for the integration of further peripheral devices.

The BC9120 has an additional RJ45 port. Both Ethernet ports operate as 2-channel switches. The I/O stations can thus be configured with a line topology, instead of the classic star topology. In many applications, this significantly reduces the wiring effort and the cabling costs. The maximum distance between two couplers/controllers is 100 m. Up to 20 BC9120 are cascadable, resulting in a maximum line length of 2 km.